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SEGMENT REPORTING (Reconciliation of Reporting Information from Segments to Consolidated Totals) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]      
Total revenues of reportable segment and consolidated revenues $ 199,574 $ 175,628 $ 182,127
Operating Income      
Total operating income for reportable segments 47,998 40,644 45,870
Other income (expenses) income (836) 268 (856)
Financing income, net 2,056 1,189 1,704
Consolidated income before taxes on income 50,054 41,833 47,574
Assets      
Current assets 115,223 91,705 103,222
Property and equipment, net 35,644 31,514 31,908
Total assets 178,019 142,003 152,337
Other significant items      
Expenditures for assets 9,331 14,871 13,172
Asset expenditures, reportable segments and unallocated amounts 13,829 18,547 15,193
Depreciation, amortization and impairment for reportable segments 9,160 8,788 9,068
Depreciation and amortization 11,635 11,962 12,219
Reportable Segment [Member]      
Operating Income      
Total operating income for reportable segments 47,998 40,644 45,870
Assets      
Total assets [1] 103,976 76,055 78,930
Other significant items      
Expenditures for assets   14,871 13,172
Depreciation, amortization and impairment for reportable segments 9,160 9,717 9,990
Segment Reconciling Items [Member]      
Operating Income      
Other income (expenses) income
Financing income, net 2,056 1,189 1,704
Assets      
Current assets 43,874 46,119 57,159
Investments in affiliated and other companies 12,060 4,783 1,095
Property and equipment, net 10,912 8,730 7,786
Other unallocated amounts 7,197 6,316 7,367
Other significant items      
Expenditure for assets unallocated amounts 4,498 3,676 1,917
Depreciation and amortization, unallocated amounts $ 2,475 $ 2,245 $ 2,229
[1] Including goodwill.